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# capybara '1.1.2

require 'capybara'
require 'capybara/dsl'
require 'capybara/mechanize'

Capybara.default_driver = :mechanize
Capybara.app_host = 'http://httpbin.org'

include Capybara::DSL

Capybara.current_session.driver.browser.agent.set_proxy ('www-cache.reith.bbc.co.uk', 80)
Capybara.current_session.driver.browser.agent.request_headers = {"X-Header" => "value"}
visit '/headers'
puts page.find('p').text